package socket;

import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;
import java.nio.charset.StandardCharsets;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

/**
 * 服务端
 */
public class Server {
    private ServerSocket serverSocket;
    //创建一个线程池
    public ExecutorService threadPool ;

    public Server() {
        try {
            System.out.println("服务器启动");
            serverSocket = new ServerSocket(8090);
            threadPool = Executors.newFixedThreadPool(30);//实例化线程池
            System.out.println("服务器启动完毕!!!");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void start() {
        try {
            while (true) {

                System.out.println("等待客户链接");
                Socket socket = serverSocket.accept();
                System.out.println("一个客户端链接了");
                ClientHandler handler = new ClientHandler(socket);
//                Thread t = new Thread(handler);
//                t.start();
                threadPool.execute(handler);
            }

        } catch (IOException e) {
            e.printStackTrace();
        }

    }

    public static void main(String[] args) {
        Server server = new Server();
        server.start();
    }

    private class ClientHandler implements Runnable {
        private Socket socket;

        public ClientHandler(Socket socket) {
            this.socket = socket;
        }

        @Override
        public void run() {
            try {
                InputStream in = socket.getInputStream();
                int len;
                while ((len = in.read()) != -1) {
                    byte[] data = new byte[len];
                    in.read(data);
                    String line = new String(data, StandardCharsets.UTF_8);
                    System.out.println("客户端说" + line);
                }
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}
